Saw-sharpening machine.



No. 628,655. Patented July II, [899. L. L. FILSTRUP.

SAW SHARPENING MACHINE.

(Application filed Apr. 10, 1899.) (N0 "0661.)

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Patented July ll, I899.

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LARS LARSEN FILSTRUP, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO H.P. SCHOFIELD, OF SAME PLACE.

SAW-SHARPENING MACHINE.

SPECIFICATION forming part of Letters Patent No. 628,655, dated July 11,1899.

Application filed April 10, 1899.

To all whom it may concern.-

Be it known that I, LABS LARSEN FILSTRUP,

, a citizen of the United States, residing at Chicago, in the county ofCook and State of Illinois, have invented a new anduseful Improvement inSaw-Sharpening Machines, of which the following is a specification.

This invent-ion relates to improvements in that class of automaticsaw-sharpening machines set forth in Patent No. 574,855, dated January5, 1897, and in Reissue Patent No. 11,733, dated April 11, 1899.

The object of the present invention is to provide a cheaper, m orepracticable,and more efficient construction for regulating theinclination of the driving-pulley having belt connection with thegrinding-wheel-arbor pulley. The pulley on the grinding-wheel arbor ofcourse varies in inclination with a change in inclination of thegrinding-wheel gate and the guides within which the latter moves, and itis desired that the driving-pulley shall be capable of adjustment ininclination to enable it to be set in the same plane as the pulley whichit drives. The advantages of such a construction 7 are sufficientlygrinding-wheel gate moving in'said guides,

B the grinding-wheel arbor provided with suitable journal-bearing, and Bthe grinding or sharpening wheel mounted on said arbor. These differentparts are capable of being adjusted to any desirable angle in accordancewith the form of saw-tooth required and are arranged in the ordinarymanner.

At the rear of the upper portion of the frame is journaled a two-partdriving-shaft C C, the horizontal part C of which is journaled in fixedbearings a a on standards D D and the inclined part C in adjustableSerial No. 712,503. (No modelh bearings b b on arms E E. The bearings 19l) are rigid with the arms which bear them, and to permit adjustment ofthe bearings the arms themselves are movably connected with standards EE secured to the frame.

The adjacent ends of the two-part drivingshaft are connected by gears FF, the teeth of which are of such a construction as to permit theinclination of the part C of the shaft to be changed without interferingwith the running of the gears. a

The arm E is mounted to swing upon a horizontal stud c, which passesthrough a vertical head 0 on the arm E and screws into a Vertical head 0on the swinging arm. The arm E is curved, as shown, and projectsrearwardly from the point of support. The pivotal point is directly infront of the upper portion of the periphery of the gear F and in theplane of engagement of the gears. In other words, the axis about whichthe arm and part C of the shaft move as a whole lies, preferably, in orclose to the line ofintersection of a horizontal plane tangential to theperiphery of the gear F at its upper portion and a vertical planecorresponding to the central plane of engagement of the gears.

The standard E is provided with a curved slot d and with a planevertical rear surface over which moves a vertical head d on the lowerforward end of the curved arm E. The head d is secured to the standard Eby means of a stud (1 which passes through the slot and screws into thevertical front surface of the head. The slot d is concentric with acircle about the axis of the arm E.

The horizontal part of the shaft is provided with a pulley G, throughthe medium of which motion is imparted to it, and the inclined part witha pulley H, connected by means of a belt 11 (see Fig. 3) with a pulley Hon the grinding-wheel arbor. It is obvious that by loosening the studs 0and d the inclination of the shaft part C may be changed to bring thepulley H to the plane of thearbor-pulley when the latter is in any givenposition desired. The teeth of the gears F F will of course be of aproper conformation to insure contact whatever the position of the shaftC.

It may be added that the power to be transmitted in a machine of thischaracter is not great and that very good results may be ob rained eventhough the gear-teeth are not cut theoretically correct and though theaxis about which the inclined shaft part swings is not located exactlyas described. Variations in details are therefore to be consideredwithin the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is

1. In a saw-sharpening machine of the class described, the combinationwith the inclined grinding-wheel gate and its arbor, of a twopartdriving-shaft one part of which is of adj ustable inclination, gears inmesh at the adjacent ends of the two-part shaft, an arm provided with abearing adjacent to the gear on the inclined shaft part and mounted toswing on a horizontal axis, and means for transmitting motion from theinclined shaft part to said arbor, substantially as and for the purposeset forth.

2. In a saw-sharpening machine of the class described, the combinationwith the inclined grinding-wheel gate and its arbor, of a twopartdriving-shaft one part of which is of adjustable inclination, gears inmesh at the adjacent ends of the two-part shaft, an arm providedwith abearing adjacent to the gear on the inclined shaft part and mounted toswing on a horizontal axis, an adjustable bearing for the outer end ofthe inclined shaft part, and means for transmitting motion from saidinclined shaft part to said arbor, substantially as and for the purposeset forth.

3. In a machine of the character described, the combination with aninclined driven pulley, of a two-part drivingshaft, one portion of whichis inclined, gears in mesh at the adjacent ends of the two shaft parts,a curved arm provided with a bearing adjacent to the gear on the innerend of the inclined shaft part and mounted to swing on a horizontal axislying substantially at the intersection of a horizontal plane tangentialto the upper surface of the gear on the horizontal shaft part and avertical plane corresponding to the central plane of engagement of thegears,

means for fixing the inclined shaft part in a given position, a pulleyon the inclined shaft part, and belt connection between said pulleys,substantially as and for the purpose set forth.

4. In a saw-sharpening machine of the class described, the combinationwith the inclined grinding-wheel gate and its arbor, of a twopartdriving-shaft, one part of which is of adjustable inclination, gears inmesh at the adjacent ends of the two-part shaft, an arm provided with abearing adjacent to the gear on the inclined shaft part and mounted toswing on a horizontal axis, a standard connected with the machine-frameprovided with a slot and a plane vertical rear face, an arm providedwith a bearing and a head contacting with said vertical face, a studconnecting said parts, and means for transmitting mo tion from theinclined shaft part to said arbor, substantially as and for the purposeset forth.

5. In a saw-sharpening machine of the class described, the combinationwith the inclined grinding-wheel gate and its arbor, of a twopartdriving-shaft, one part of which is of variable inclination, fixedbearings for the horizontal shaft part, gears at the adjacent ends ofthe shaft parts, a fixed standard provided with a'perfora ted verticalhead,a swinging arm provided with a vertical head secured to thefirst-named head and provided at its free end with a shaft-bearing, anadjustable bearing for the outer end of the inclined shaft part, andmeans for transmitting motion from said inclined shaft part to saidarbor, substantially as and for the purpose set forth. LABS LARSENFILSTRUP. In presence of R. T. SPENCER, ARTHUR DYRENFORTH.

